scripts: use more portable shebang

scripts/check-bolt-msg-type-order.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #
 # This script is called in the CI pipeline. It makes sure that the BOLT message
 # type constants in smite/src/bolt.rs are listed in increasing order.

scripts/coverage-report.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #
 # Generate an HTML coverage report from a corpus of fuzz inputs.
 #

scripts/enable-vmware-backdoor.sh

@@ -1,4 +1,5 @@
-#!/bin/bash -eu
+#!/usr/bin/env bash
+set -eu
 
 if grep -q AuthenticAMD /proc/cpuinfo; then
     KVM_MOD="kvm-amd"

scripts/setup-nyx.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #
 # Setup script for Nyx mode fuzzing with AFL++
 #

scripts/symbolize-crash.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #
 # Symbolize a crash report from the CLN fuzzer.
 #